/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.hadoop.hive.ql.udf;

import java.math.BigDecimal;
import java.math.RoundingMode;

import org.apache.hadoop.hive.ql.exec.UDF;


public class UDFRound extends UDF {

  public UDFRound() {
  }

  public Long evaluate(Double n) {
    if (n == null)
      return null;
    return evaluate(n, 0).longValue();
  }

  public Double evaluate(Double n, Integer i) {
    if ((n == null) || (i == null))
      return null;
    return BigDecimal.valueOf(n).setScale(i, RoundingMode.HALF_UP).doubleValue();
  }
  
}
